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  • Scolytidae
  • Springer  (3)
  • 2005-2009
  • 1990-1994
  • 1985-1989  (3)
  • 1980-1984
  • 1975-1979
  • 1965-1969
  • 1985  (3)
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  • Springer  (3)
Years
  • 2005-2009
  • 1990-1994
  • 1985-1989  (3)
  • 1980-1984
  • 1975-1979
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  • 1
    Electronic Resource
    Electronic Resource
    Determination of chirality of alcohol or latent alcohol semiochemicals in individual insects (1985)
    Springer
    Journal of chemical ecology 11 (1985), S. 1659-1667 
    Details
    ISSN: 1573-1561
    Keywords: Chiral semiochemicals ; pheromones ; enantiomeric composition ; Ips pini ; Coleoptera ; Scolytidae ; Apis mellifera ; Hymenoptera ; apidae ; Cryptolestes Ferrugineus ; Cucujidae ; acetyl lactate diastereoisomers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract A method is described for determining the enantiomeric composition of chiral alcohols, lactones, and hydroxy acids in quantities ranging from 25 ng to 10 μg. Derivatization of the substance with chirally pure acetyl lactate, followed by splitless capillary gas chromatography, enables enantiomeric determinations to be made within 1–3% of the actual value. This technique was applied in the determination of semiochemical inIps pini (Say),Apis mellifera (L.), andCryptolestes ferrugineus (Stephens). The results indicate that considerable variability exists within populations of some insects in the composition of their chiral semiochemicals, whereas others produce substances of constant composition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01012119
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  • 2
    Electronic Resource
    Electronic Resource
    Field response ofDendroctonus brevicomis toexo-brevicomin, frontalin, and myrcene released at two proportions and three levels (1985)
    Springer
    Journal of chemical ecology 11 (1985), S. 757-766 
    Details
    ISSN: 1573-1561
    Keywords: Dendroctonus brevicomis ; Coleptera ; Scolytidae ; bark beetle ; western pine beetle ; attractant rate ; pheromone ; exo-brevicomin ; frontalin ; myrcene
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Racemicezo-brevicomin, racemic frontalin, and myrcene were released at two proportions (5∶1∶400 and 1∶1∶1), each at three levels (1 ×, 10 ×, and 100 ×) in a ponderosa pine forest in central California. The 5∶1∶400 mix was based on an estimate of the relative amounts released from a ponderosa pine under attack by the western pine beetle,Dendroctonus brevicomis. MoreD. brevicomis were trapped at a source of the three compounds released at 5∶1∶400 than were trapped at a source released at 1∶1∶1, at all three levels, but this difference was statistically significant only at the 1 × and 10 × levels. Sex ratio of trapped beetles and distribution of catch at the source of attractant and 5 m away apparently did not differ between relative release rates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00988303
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  • 3
    Electronic Resource
    Electronic Resource
    Behavior of the western pine beetle during host colonization (1985)
    Springer
    Journal of chemical ecology 11 (1985), S. 1249-1261 
    Details
    ISSN: 1573-1561
    Keywords: Pinus ponderosa ; Dendroctonus brevicomis ; pheromone ; attractant ; interruptant ; exo-brevicomin ; frontalin ; Coleoptera ; Scolytidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract After living ponderosa pines were baited with either female-infested bolts or synthetic pheromones,Dendroctonus brevicomis were caught on sticky screens throughout trapping periods of 15–46 days; however, large numbers of beetles were trapped during only a small portion (5–10 days) of these trapping periods. The most attractive portions of trees attacked contained 3–6 beetles dm2, in galleries ca. 2 cm long. Catch increased following addition of males to female-infested bolts, supporting the hypothesis that male-produced frontalin is an attractive pheromone of the western pine beetle. Catch at bolts removed from trees under attack was strongly dependent upon levels of boring activity. We found no evidence of interruption of the response to attractants during host colonization.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01024113
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